CN104449943A - Fire coal combustion-supporting desulfurization powder for flue gas desulfurization and preparation method thereof - Google Patents
Fire coal combustion-supporting desulfurization powder for flue gas desulfurization and preparation method thereof Download PDFInfo
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Abstract
The invention discloses fire coal combustion-supporting desulfurization powder for flue gas desulfurization and a preparation method thereof. The fire coal combustion-supporting desulfurization powder consists of the following components in parts by weight: 90-95 parts of boron mud, 2-5 parts of a catalyst, 2-5 parts of iron powder and 1-2 parts of aluminum oxide. The preparation method comprises the following steps: step 1, grinding 90-95 parts of the boron mud until the granularity is 100 meshes or smaller, adding 2-5 parts of diluted nitric acid, uniformly mixing and reacting for 18-24 hours; step 2, adding a product obtained in the step 1 into 2-5 parts of the iron powder and uniformly mixing; step 3, adding the product obtained in the step 2 into 1-2 parts of the aluminum oxide, uniformly mixing, reacting for 18-24 hours and then bagging. The fire coal combustion-supporting desulfurization powder disclosed by the invention has the advantages that the thermal efficiency of a boiler is improved by 5% to 10%; the combustion temperature in a hearth is increased by 50 to 100 DEG C; the content of combusted slag dust is reduced by 5% to 10% in comparison with the original content; the coal saving ratio is about 5% to 10%; the emission quantity of sulfur dioxide can be reduced by 60% to 90%; the emission quantity of nitric oxide can be reduced by more than 40%; the Ringelman black of smoke dust can be obviously reduced as well.
Description
Technical field
The present invention relates to coal desulfurization field, particularly relate to a kind of flue gas desulfurization coal-fired combustion-supporting desulfurization powder.
Background technology
Coal is all employed in many enterprises of China, especially power station and iron and steel enterprise application maximum.In the coal that China produces, sulphur content is higher, and direct burning can produce sulfur dioxide gas, can pollute air.Therefore, need to carry out desulfurization process to coal.In present Desulfurization Technique for Coal-fired Boilers, burning front desulfurization, i.e. coal-washing technique, by coal washing, removes the sulfur in fire coal, reaches Filter Tuber For Clean Coal burning, reduces SO
2the object of discharge.But this coal-washing technique cannot be removed by physical method due to fine particle shape pyrite and organosulfur, and therefore sweetening effectiveness is poor.Tail flue gas desulfurization, though desulfurization degree is high, the installations and facilities of its disposable input are taken, annual running cost and equipment maintenance cost too high, non-general power plant can bear, and especially uses the power plant of the medium small boiler of coal-fired or low grade coal, therefore not easily applies.Coal mixing combustion sulphur-fixing agent desulfurization technology, namely adopts coal mixing combustion sulphur-fixing agent and coal-fired Homogeneous phase mixing, enters boiler and carry out combustion desulfurization, and this desulfurization technology cost is low, without installations and facilities input, but existing sulphur-fixing agent sweetening effectiveness is still undesirable.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of coal-firing efficient desulfurized powder, can solve the defect existed in prior art, has preferably sweetening effectiveness to coal.
Described technical scheme is as follows:
The present invention proposes a kind of flue gas desulfurization coal-fired combustion-supporting desulfurization powder, and by boron mud, catalyzer, iron powder, aluminium sesquioxide forms, and its weight proportion is, boron mud 90-95 part, catalyzer 2-5 part, iron powder 2-5 part, aluminium sesquioxide 1-2 part.
Preferential as technique scheme, described boron mud contains the component of following weight part: silicon-dioxide 23-29 part, ferric oxide 5-10 part, calcium oxide 5-10 part, magnesium oxide 35-45 part, boron trioxide 8-15 part, sodium oxide 0.5-2 part.
Preferential as technique scheme, described catalyzer is dust technology.
The preparation method of this flue gas desulfurization coal-fired combustion-supporting desulfurization powder,
Step 1, get boron mud 90-95 part and be ground to 100 orders or following, add after dust technology 2-5 part mixes, reaction 18-24 hour;
Step 2, step 1 products therefrom is added iron powder 2-5 part after mix;
Step 3, step 2 products therefrom is added aluminium sesquioxide 1-2 part after mix, react after 18-24 hour pack.
Preferential as technique scheme, described boron mud contains the component of following weight part: silicon-dioxide 23-29 part, ferric oxide 6-10 part, calcium oxide 5-10 part, magnesium oxide 38-45 part, boron trioxide 8-15 part, sodium oxide 0.5-1.5.
The flue gas desulfurization coal-fired combustion-supporting desulfurization powder that the present invention proposes, the technique effect had is:
1, make boiler thermal effect improve 5-10%, the temperature of combustion in burner hearth improves 50-100 degree Celsius.Ash quarrel content after burning declines than originally 5-10%, and coal saving rate is at 5-10%.
2, reduce sulphur dioxide emission 60-90%, comprise Industrial Boiler loose coal and household coal.
3, reduce nitrogen oxide emission more than 40%, comprise Industrial Boiler loose coal and household coal, nox purification rate reaches about 40%.
4, obvious reducing effect is had to flue dust lingemann blackness.The blackness of about 3 grades can be made to be down to less than 1 grade or 1 grade, to reach the emission standard of national requirements.
5, detect through science and repeatedly verify, to the low-heat low grade coal about 5000 kilocalories, the calorific value of more than 6000 kilocalories after adding combustion-supporting sulphur removal powder, can be produced.Make low grade coal optimization, open keep away out an effective approach for developing low grade coal in a large number and saving coal resource.
6, boiler soot emission amount 60-90% is reduced.
7, a kind of flue gas desulfurization coal-fired combustion-supporting desulfurization powder of the present invention's proposition, is applicable to circulating fluidized bed boiler.
A kind of coal-fired combustion-supporting sulphur removal powder that the present invention proposes reduces the mechanism of sulfurous gas:
Containing catalyzer and activator in the coal-fired combustion-supporting sulphur removal powder that the present invention proposes, make its active increase, a large amount of active metal oxide, as magnesium oxide, the S-contained substance discharged in ferric oxide etc. with fire coal forms neutral sulfate solid, can be fixed in slag.
Combustion-supporting sulphur removal powder also has the composition of much calcium, and during coal burning, the sulfurous gas of generation and calcification are closed and become calcium sulfate (gypsum), and the quantity of the sulfurous gas of discharging into the atmosphere to make fire coal significantly reduces.
Silicon type oxide (SiO
2) in high-temp combustion process, complicated complex compound can be generated, thus improve high-temp combustion sulfur-fixing rate.Meanwhile, boron trioxide is under a certain amount of, and the pyrolysis of coal and temperature of combustion can be made to reduce, and rate of weight loss improves, but also the products of combustion of raw coal is formed or structure changes, thus reduces remaining carbon.
The mechanism that a kind of coal-fired combustion-supporting sulphur removal powder that the present invention proposes can make low grade coal optimization, save energy improves boiler thermal output:
Containing a large amount of active metal oxide in the coal-fired combustion-supporting sulphur removal powder that the present invention proposes, except with sulfurous gas generation chemical reaction except, also play combustion-supporting and effect that is catalyticcombustion, change the situation that original burning is insufficient.A great deal of elemental metals high energy fuels is also had in sulphur removal powder, during burning and strong oxidizer generation replacement(metathesis)reaction discharge a large amount of heat energy, when making burning, temperature improves more than 50-100 DEG C, aphlogistic composition original in low grade coal, as coal gangue also can Thorough combustion, make boiler slag carbon content decline about the 5-10% after burning.
A kind of coal-fired combustion-supporting sulphur removal powder that the present invention proposes can reduce smoke discharge amount, reduces the mechanism of lingemann blackness:
Lingemann blackness surpasses bar problem, is exactly the very fine coal face of volatilizing in fire coal, also claims suspended particulate, does not burn or Thorough combustion, cause blowing from flue coming up in boiler.The coal-fired combustion-supporting sulphur removal powder that the present invention proposes, makes the temperature of combustion in burner hearth improve more than 50-100 degree Celsius, that superfine pulverized coal face and suspended particulate Thorough combustion is changed into heat energy.Therefore, while raising boiler thermal output, smoke contamination is reduced.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below embodiment of the present invention is described further in detail.
Embodiment 1
The present embodiment proposes a kind of flue gas desulfurization coal-fired combustion-supporting desulfurization powder, and its weight proportion comprises 90 parts, boron mud, dust technology 3 parts, iron powder 2 parts, aluminium sesquioxide 1 part.
Wherein, described boron mud contains the component of following weight part: silicon-dioxide 23 parts, ferric oxide 5 parts, 5 parts, calcium oxide, 35 parts, magnesium oxide, boron trioxide 8 parts, and sodium oxide 0.5 part and other a small amount of impurity, as sulphur.
The preparation method of this flue gas desulfurization coal-fired combustion-supporting desulfurization powder,
1, get 90 parts, boron mud and be ground to 100 orders or following, add after dust technology 3 parts mixes, reaction 18-24 hour;
2, mix after step 1 products therefrom being added iron powder 2 parts;
3, mix after step 2 products therefrom being added aluminium sesquioxide 1 part, react after 18-24 hour and pack.
Described boron mud contains the component of following weight part: silicon-dioxide 23 parts, ferric oxide 5 parts, 5 parts, calcium oxide, 35 parts, magnesium oxide, boron trioxide 8 parts, and sodium oxide 0.5 part and other a small amount of impurity, as sulphur.
Embodiment 2
The present embodiment proposes a kind of flue gas desulfurization coal-fired combustion-supporting desulfurization powder, and by boron mud, dust technology, iron powder, aluminium sesquioxide forms, and its weight proportion is, 92 parts, boron mud, dust technology 3.2 parts, iron powder 2.5 parts, aluminium sesquioxide 1.2 parts.
Wherein said boron mud contains the component of following weight part: silicon-dioxide 25 parts, ferric oxide 6 parts, 6 parts, calcium oxide, 40 parts, magnesium oxide, boron trioxide 12 parts, and sodium oxide 1 part and other a small amount of impurity, as sulphur.
The preparation method of this flue gas desulfurization coal-fired combustion-supporting desulfurization powder,
1, get 92 parts, boron mud and be ground to 100 orders or following, add after dust technology 3.2 parts mixes, reaction 18-24 hour;
2, mix after step 1 products therefrom being added iron powder 2.5;
3, mix after step 2 products therefrom being added aluminium sesquioxide 1.2 parts, react after 18-24 hour and pack.
Described boron mud contains the component of following weight part: silicon-dioxide 25 parts, ferric oxide 6 parts, 6 parts, calcium oxide, 40 parts, magnesium oxide, boron trioxide 12 parts, and sodium oxide 1 part and other a small amount of impurity, as sulphur.
Embodiment 3
The present embodiment proposes a kind of flue gas desulfurization coal-fired combustion-supporting desulfurization powder, and by boron mud, dust technology, iron powder, aluminium sesquioxide forms, and its weight proportion is, 94 parts, boron mud, dust technology 4 parts, iron powder 4 parts, aluminium sesquioxide 1.5 parts.
Wherein, described boron mud contains the component of following weight part: silicon-dioxide 26 parts, ferric oxide 8 parts, 7 parts, calcium oxide, 41 parts, magnesium oxide, boron trioxide 12 parts, and sodium oxide 1.5 parts and other a small amount of impurity, as sulphur.
The preparation method of this flue gas desulfurization coal-fired combustion-supporting desulfurization powder,
1, get 94 parts, boron mud and be ground to 100 orders or following, add after dust technology 4 parts mixes, reaction 18-24 hour;
2, mix after step 1 products therefrom being added iron powder 4 parts;
3, mix after step 2 products therefrom being added aluminium sesquioxide 1.5 parts, react after 18-24 hour and pack.
Described boron mud contains the component of following weight part: silicon-dioxide 26 parts, ferric oxide 8 parts, 7 parts, calcium oxide, 41 parts, magnesium oxide, boron trioxide 12 parts, and other a small amount of impurity of sodium oxide 1.5 parts, as sulphur.
Embodiment 4
The present embodiment proposes a kind of flue gas desulfurization coal-fired combustion-supporting desulfurization powder, and by boron mud, dust technology, iron powder, aluminium sesquioxide forms, and its weight proportion is, 95 parts, boron mud, dust technology 3.2, iron powder 3 parts, aluminium sesquioxide 1.8 parts.
Described boron mud contains the component of following weight part: silicon-dioxide 25 parts, ferric oxide 10 parts, 8 parts, calcium oxide, 36 parts, magnesium oxide, boron trioxide 9 parts, and sodium oxide 1.1 parts and other a small amount of impurity, as sulphur.
The preparation method of this flue gas desulfurization coal-fired combustion-supporting desulfurization powder,
1, get 95 parts, boron mud and be ground to 100 orders or following, add after dust technology 3.2 parts mixes, reaction 18-24 hour;
2, mix after step 1 products therefrom being added iron powder 3;
3, mix after step 2 products therefrom being added aluminium sesquioxide 1.8 parts, react after 18-24 hour and pack.
Described boron mud contains the component of following weight part: silicon-dioxide 25 parts, ferric oxide 10 parts, 8 parts, calcium oxide, 36 parts, magnesium oxide, boron trioxide 9 parts, and sodium oxide 1.1 parts and other a small amount of impurity, as sulphur.
Embodiment 5
The present embodiment proposes a kind of flue gas desulfurization coal-fired combustion-supporting desulfurization powder, and by boron mud, dust technology, iron powder, aluminium sesquioxide forms, and its weight proportion is, 94 parts, boron mud, dust technology 4 parts, iron powder 4 parts, aluminium sesquioxide 1.2 parts.
Wherein, described boron mud contains the component of following weight part: silicon-dioxide 28 parts, ferric oxide 9 parts, 9 parts, calcium oxide, 43 parts, magnesium oxide, boron trioxide 13 parts, and sodium oxide 1.7 parts and other a small amount of impurity, as sulphur.
The preparation method of this flue gas desulfurization coal-fired combustion-supporting desulfurization powder,
1, get 94 parts, boron mud and be ground to 100 orders or following, add after dust technology 4 parts mixes, reaction 18-24 hour;
2, mix after step 1 products therefrom being added iron powder 4 parts;
3, mix after step 2 products therefrom being added aluminium sesquioxide 1.2 parts, react after 18-24 hour and pack.
Described boron mud contains the component of following weight part: silicon-dioxide 28 parts, ferric oxide 9 parts, 9 parts, calcium oxide, 43 parts, magnesium oxide, boron trioxide 13 parts, and sodium oxide 1.7 parts and other a small amount of impurity, as sulphur.
Embodiment 6
The present embodiment proposes a kind of flue gas desulfurization coal-fired combustion-supporting desulfurization powder, and by boron mud, dust technology, iron powder, aluminium sesquioxide forms, and its weight proportion is, 95 parts, boron mud, dust technology 5 parts, iron powder 5 parts, aluminium sesquioxide 2 parts.
Wherein, described boron mud contains the component of following weight part: silicon-dioxide 29 parts, ferric oxide 10 parts, 10 parts, calcium oxide, 45 parts, magnesium oxide, boron trioxide 15 parts, and sodium oxide 2 parts and other a small amount of impurity, as sulphur.
The preparation method of this flue gas desulfurization coal-fired combustion-supporting desulfurization powder,
1, get 95 parts, boron mud and be ground to 100 orders or following, add after dust technology 5 parts mixes, reaction 18-24 hour;
2, mix after step 1 products therefrom being added iron powder 5 parts;
3, mix after step 2 products therefrom being added aluminium sesquioxide 2 parts, react after 18-24 hour and pack.
Described boron mud contains the component of following weight part: silicon-dioxide 29 parts, ferric oxide 10 parts, 10 parts, calcium oxide, 45 parts, magnesium oxide, boron trioxide 15 parts, and sodium oxide 2 parts and other a small amount of impurity, as sulphur.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a flue gas desulfurization coal-fired combustion-supporting desulfurization powder, is characterized in that, by boron mud, catalyzer, iron powder, aluminium sesquioxide forms, and its weight proportion is, boron mud 90-95 part, catalyzer 2-5 part, iron powder 2-5 part, aluminium sesquioxide 1-2 part.
2. flue gas desulfurization coal-fired combustion-supporting desulfurization powder according to claim 1, it is characterized in that, described boron mud contains the component of following weight part: silicon-dioxide 23-29 part, ferric oxide 5-10 part, calcium oxide 5-10 part, magnesium oxide 35-45 part, boron trioxide 8-15 part, sodium oxide 0.5-2 part.
3. flue gas desulfurization coal-fired combustion-supporting desulfurization powder according to claim 1, is characterized in that, described catalyzer is dust technology.
4. a preparation method for flue gas desulfurization coal-fired combustion-supporting desulfurization powder according to claim 1, is characterized in that,
Step 1, get boron mud 90-95 part and be ground to 100 orders or following, add after dust technology 2-5 part mixes, reaction 18-24 hour;
Step 2, step 1 products therefrom is added iron powder 2-5 part after mix;
Step 3, step 2 products therefrom is added aluminium sesquioxide 1-2 part after mix, react after 18-24 hour pack.
5. the preparation method of flue gas desulfurization coal-fired combustion-supporting desulfurization powder as claimed in claim 4, it is characterized in that, described boron mud contains the component of following weight part: silicon-dioxide 23-29 part, ferric oxide 6-10 part, calcium oxide 5-10 part, magnesium oxide 38-45 part, boron trioxide 8-15 part, sodium oxide 0.5-1.5.
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Cited By (5)
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| CN111171891A (en) * | 2020-02-27 | 2020-05-19 | 廊坊中蓝星新材料节能环保有限公司 | Synergistic dust suppressant and application thereof |
| CN111570022A (en) * | 2020-05-26 | 2020-08-25 | 镇江市蓝火环保能源有限公司 | Hot air energy-saving environment-friendly pulverized coal processing technology |
| CN113322114A (en) * | 2021-05-07 | 2021-08-31 | 宁夏亘峰嘉能能源科技股份有限公司 | Coal gangue-based briquette sulfur fixing agent |
| CN113649401A (en) * | 2021-08-20 | 2021-11-16 | 东北大学 | Method for realizing high-temperature sulfur fixation of high-sulfur coal gangue by using boron mud |
| CN113773890A (en) * | 2021-08-19 | 2021-12-10 | 珠海市胜彥节能环保科技有限公司 | Catalytic desulfurization treatment method for high-sulfur coal for combustion |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111171891A (en) * | 2020-02-27 | 2020-05-19 | 廊坊中蓝星新材料节能环保有限公司 | Synergistic dust suppressant and application thereof |
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| CN113773890A (en) * | 2021-08-19 | 2021-12-10 | 珠海市胜彥节能环保科技有限公司 | Catalytic desulfurization treatment method for high-sulfur coal for combustion |
| CN113773890B (en) * | 2021-08-19 | 2024-03-08 | 珠海市胜彥节能环保科技有限公司 | Catalytic desulfurization treatment method for high-sulfur coal for combustion |
| CN113649401A (en) * | 2021-08-20 | 2021-11-16 | 东北大学 | Method for realizing high-temperature sulfur fixation of high-sulfur coal gangue by using boron mud |
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Application publication date: 20150325 |